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Finding the Fourth Proportional to 71,556.30, 107,334.45 and 18,971.10

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Solution

The fourth proportional to 71,556.30, 107,334.45 and 18,971.10 is: 28,456.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,556.30 : 107,334.45 = 18,971.10 : x
  2. Step 2: Convert to fraction form
    71,556.30/107,334.45 = 18,971.10/x
  3. Step 3: Cross multiply
    71,556.30x = 107,334.45 × 18,971.10
  4. Step 4: Simplify right side
    71,556.30x = 2,036,252,584.40
  5. Step 5: Solve for x
    x = 2,036,252,584.40/71,556.30
  6. Step 6: Final answer
    x = 28,456.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.